Section A: Add Within 1,000

Practice Problems

• Lesson 1 : Represent Numbers in Different Ways

• Lesson 2 : Expanding Ten-Thousands

• Lesson 3 : Addition and Subtraction Situations

• Lesson 4 : Add Your Way

• Lesson 5 : Introduction to Addition Algorithms

• Lesson 6 : Another Addition Algorithm

• Lesson 7 : Use Strategies and Algorithms to Add

Section B: Subtract Within 1,000

Practice Problems

• Lesson 8 : Subtract Your Way

• Lesson 9 : Subtraction Algorithms (Part 1)

• Lesson 10 : Subtraction Algorithms (Part 2)

• Lesson 11 : Subtraction Algorithms (Part 3)

• Lesson 12 : Analyze Subtraction Algorithms

• Lesson 13 : Subtract Strategically

Section C: Round Within 1,000

Practice Problems

• Lesson 14 : Multiples of 100

• Lesson 15 : Nearest Multiples of 10 and 100

• Lesson 16 : Round to the Nearest Ten and Hundred

• Lesson 17 : Round and Round Again

Section D: Solve Two-Step Problems

Practice Problems

• Lesson 18 : Does It Make Sense?

• Lesson 19 : Diagrams and Equations for Word Problems

• Lesson 20 : Situations and Equations

• Lesson 21 : More Practice to Represent and Solve

• Lesson 22 : Classroom Supplies